ToolFoxAge Calculator
Find your exact age in years, months and days — plus total days lived and days until your next birthday.
Pick your date of birth to see your exact age.
How it works
The calculator subtracts your date of birth from the chosen date calendar-wise: it first counts whole years, then whole months, then leftover days, borrowing from the previous month or year when needed — the same way ages are stated on official forms. Total days are the exact number of days between the two dates, including leap days.
Example
Someone born on 15 May 1990 is, as of 22 August 2026, exactly 36 years, 3 months and 7 days old — 13,248 days lived — and their next birthday is 266 days away.
Frequently asked questions
Does it account for leap years?
Yes. All arithmetic uses real calendar dates, so 29 February and leap years are handled exactly.
Can I calculate age at a past or future date?
Yes — set the "as of" date to any date after the date of birth, such as an exam cutoff or joining date.
Why do different sites show slightly different months/days?
There are two conventions for borrowing days across months; ToolFox uses the calendar-month convention used on most official forms.
Is my date of birth stored anywhere?
No. The calculation runs entirely in your browser; nothing is sent or saved.
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